UC-2344 - Vaqueros Fm (Miocene of the United States)

Where: Orange County, California (33.8° N, 117.7° W: paleocoordinates 32.8° N, 111.5° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Vaqueros Formation, Early/Lower Miocene (23.0 - 16.0 Ma)

• STRATIGRAPHIC RELATIONS: From the Vaqueros Fm, which unconformably overlies the Eocene Tempetate/Martinez Fm, and is overlain by the Temblor Fm (Middle Miocene). THICKNESS: From bed within unit which locally reaches 500 ft in thickness. AGE: Early Miocene on the basis of molluscan biostratigraphy. STRATIGRAPHIC POSITION: From the Turritella inezana zone in the part of the Vaqueros Fm.

• bed-level stratigraphic resolution

Environment/lithology: coastal; poorly lithified, silty sandstone

• ENVIRONMENT: From rather shallow siliciclastic marine facies on the basis of faunal composition.
• SPECIFIC LITHOLOGY: Light colored sandstones and silty sandstones. LITHIFICATION: Poorly lithified on the basis of facies description of adjacent strata and age.

Size class: macrofossils

Reposited in the UCMP

Collection methods: surface (in situ),

• COLLECTOR: W. H. Corey, C. D. Meserve, R. E. Dickerson, and W. S. W. Kew (c. late 1910-20's). REPOSITORY: University of California, Berkeley (UCNMP).

Primary reference: W. Loel and W. H. Corey. 1932. The Vaqueros Formation, Lower Miocene of California (Part 1). University of California Publications, Bulletin of the Department of Geological Sciences 22(3):31-410 [A. Hendy/A. Hendy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 71227: authorized by Austin Hendy, entered by Austin Hendy on 21.04.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for bivalvia and gastropoda, with annelida, bryozoa, crustacea, and pisces also listed. NOMENCLATURE: Antiquated nomenclature, but from authoritative publication with consistent use of species and subgenus-level assignments.
 Arcida - Arcidae
Arca (Anadara) santana n. sp. Loel and Corey 1932 ark
 Cardiida - Veneridae
Dosinia santana Loel and Corey 1932 venus clam
Tivela (Pachydesma) inezana Conrad 1849 venus clam
 Neogastropoda - Olividae
"Oliva californica" = Oliva (Oliva) californica, Olivella santana n. sp.
"Oliva californica" = Oliva (Oliva) californica Anderson 1905 olive snail
Olivella santana n. sp. Loel and Corey 1932 olive snail
 Neogastropoda - Terebridae
Terebra santana n. sp. Loel and Corey 1932 auger snail
 Naticoidea - Naticidae
"Polinices recluzianus" = Glossaulax reclusiana
"Polinices recluzianus" = Glossaulax reclusiana Deshayes 1841 moon snail
 Calyptraeoidea - Calyptraeidae
Crepidula diminutiva Loel and Corey 1932 slipper shell
 Clypeasteroida - Scutellidae